Side frame for car trucks



Alma 3 wfiific J W. DALMAN 511m FRAME FOR cm TRUCKS Filed Nov. 2'7 1925 W Q A 0M,

Patented Aug 3, 1926.

FFl E.

30HI-T W. IDALMAN, OF CHICAGO, ILLINOIS, ASSIGNOR TO DALMAN-CHIL'ES COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

SIDE FE FOR CAR TRUCKS.

Application filed November 27, 1925. Serial No. 71,5246.

This invention relates to certain novel improveirrents in side-frames for cartrucks and consists of the matters hereinafter described and more particularly pointed out in the appended claims.

The invention relates especially to truck side-frames of the kind which are cast or made integral with the journal box One object of the invention is to improve the construction of such side-frames in such manner that it may be made with less metal than is now required without in any way impairing or reducin the strength of the structure. Another ohject of the invention is to simplify the core work required in the foundry when casting a truck of the kind.

These and other objects and advantages of the invention will appear more clearly as l proceed with my specification.

lln the drawings Figure 1 is a View representing in side elevation one-halt of a side-frame for a truck made in accordance with my inven tion.

[Figures 2, 3, and 4 illustrate partial sections through the side-frame shown in Figure 1 in planes indicated by the lines 22, 33, and M, respectively.

Figure 5 is a top plan view of the inclined part of the bottom or tension member of the side-frame.

Figures 6 and 7 illustrate other artial sections through the side-frame out igure 1 in planes respectively indicated by the lines 6-6 and 7-? thereof.

Figure 8 represents in side elevation a part of a side-frame showing a somewhat modified form of the invention.

Referrin now to that embodiment of the invention ilustrated in the drawings indicates the top compression bar of the sidetrame; 16 is the bottom tension member of said frame; and 17 indicates the journal box. 18 indicates one of the pair of u right columns which are spaced apart in the central portion of the side-frame and between which a transverse bolster, spring plank, and. springs of well-known form are sup orted in any usual manner.

'11 1e top compression bar 15 and the bottom tension member 16 are made of channel bar construction as usual, as shown respectively in Figures 7 and 6. As new generally constructed, this channel construction is continued through the downwardly inat this point.

clined end parts 15* of the upper compression bar and throu h the upwardly inclined end parts 16 of t e bottom tension member to the journal box 17. The walls of said journal box are made integral with said channel construction, including the horizontal webs 15 and 16 of the said top and bottom members, as well as the flanges 15 and 16 thereot,

in the improved side-frame, the flanges 15, 15 of the top member as well as the flanges 16, 16 of the bottom or tension memher are converged towards each other to meet and join respectively, at points spaced somewhat from the journal box, in a flat, vertical web 18, which is made integral with the journal box (see Figure 5). The said side flanges 15 and 16 disappear in said web 18, which is reinforced and stiflened at its inner edge by a head 18*, which connects the two parts of the side-frame where the flanges 15 and 16 come together, as indicated respectively at 19 and 20.

The horizontal Web 16 of the bottom member 16 joins the side wall of the journal box shortly below the top, inner corner of said box at 21 and the vertical web 18 is continued below this point as indicated at 18 to provide the necessary cross-seetional area required to withstand strains The horizontal web 15* of the top compression member is carried over to the outer wall of the journal box which it joins. at its top as clearly indicated in Figure 1. so

By the foregoing construction, it will be obvious that, while the required channel section of the top and bottom members of the side-frame is maintained towards the central part of the side-frame, where the greatest transverse stresses occur, a simple I- beam structure is presented on any and all sections in the immediate nei hborhood of the journal box where suc' transverse stresses are greatly reduced. A. familiar 100 calculation will indicate that the K-beam thus ofi ered, resents ample cross-sectional area of metal to withstand the transverse strains required to be met ad'acent the jaur nal box. Considerable meta is thus saved 105 at this point and this without in any way impairing the required strength of the structure.

In addition it will be evident that the core work in the foundry is simplified adjacent W I the journal box, since there are no channels in that neighborhood to be provided for.

In Figure 8, I have shown a slightly modified form of the invention. In that view like parts are indicated by the same numerals heretofore employed. In this case the horizontal web 15 of the top compression member, instead of being COIltlIlUG'l out to the outer wall of the journal box, as in the construction above described, is turned down short of that wall to join the top wall of the journal box at a point intermediate its inner and outer walls, as indicated at 15". In this case the flat, vertical web 18 is continued beyond the said horizontal web 15 to the outer wall of the journal box, as indicated at 18 It will be understood that, while in describing my invention I have indicated more or less exact limits at which the channel form of the main intermediate part of the side-frame terminates and at which the I- beam section in the neighborhood of the journal box begins, the invention is not in any way limited thereby-except as may be pointed out in the appended claims.

I claim as my invention 1. In an integral side-frame-journal-box intermediate the journal boxes, and being of I-section at and in the neighborhood of the journal box.

2. In an integral side-frame-journal-box structure for car trucks, a side-frame having a top compression member and a bottom tension member, said two members in the main part of the frame intermediate the journal boxes being of channel form including horizontal webs and vertical flanges, the horizontal web of the top member joining the top of the journal box and the horizontal web of the bottom member joining the inner wall of the journal box, and the vertical flanges of said members converging towards each other to join at points spaced inwardly from the journal box in a vertical web which extends from the top wall and side wall of said boxes. 4

In testimony that I claim the foregoing as my invention, I aflix my signature this 21st day of November, A. D. 1925.

JOHN W. DALMAN. 

